单项选择题


A．away
B．over
C．down
D．back
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单项选择题
A．by some meansB．by any meansC．by no meansD．by all means
A．by some means
B．by any means
C．by no means
D．by all means
单项选择题
A．basisB．baseC．foundationD．ground
A．basis
B．base
C．foundation
D．ground
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